Irrigation. Colorado Fertile valley near Riverside station, Colorado. Hall, History. Colorado v.4 p.79 Location; water from Ohio Creek into the valley. Hall, Hist. Colorado v.4 p.149 Streams afford abundance of water for irrigation, in Tomichi Valley. Hall, Hist. Colorado v.4 p.149 Brief description; source of water supply; names of rivers in Mesa Verde area. Hall, Hist. Colorado v.4 p.90 Crops planted in Mancos Valley, 1875. Hall, Hist. Colorado v.4 p.173 Mormon colony perfects irrigation system, 1878 in Manassa. Ha1lgbHist. Colorado v.4 p.97